Alternatively, add up the forces, including directions, to find the size and direction of the net force and then multiply by the distance over which the net force is applied to get the net work. We is...Alternatively, add up the forces, including directions, to find the size and direction of the net force and then multiply by the distance over which the net force is applied to get the net work. We isolate the final velocity at the end of the launch phase (as the person leaves the ground) Apply the work-energy principle to the in-air section of the jump to determine the peak height of their jump. [Hint: You already know the size of the force of gravity, it’s their weight of 825 N]
